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(Nomodel') A. LANGERFELD.

MEANS FOR BMBOSSING SHEET METAL. No. 892,977. Patented Nov. 13, 1888.

0 T Fig.2 1

UNITED STATES PATENT ARTHUR LANGERFELD, or NEW YORK, N. Y.

MEANS FOR EMBOSSING SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 392,977, dated November13, 1888.

(No model.)

To all whom, it may concern:

, Be it known that I, ARTHUR LANGERFELD, a citizen of the United States,residing at the city, county, and State of New York, have inventedcertain new and useful Improvements in Embossing Sheet-Metal Articles;and I do hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to an improvement in the means for embossing spunbodies and other forms of sheet metal or other similar materials in diesbythe pressure of a fluid, and is useful for embossing vases,lamp-bodies, parts of chandeliers, silver and white-metal hollow ware;and the objects of my invention are to provide an expeditious means forplacing the sheet metal in the die, making a tight connection with thefluid, and readily disconnecting and taking out the sheet metal whenembossed. I attain these objects by means of the device illustrated inthe accompanying drawings, in Which- Figure 1 shows an external top viewof an .inelosure, E G E G, containing the sections D of a sectional die,(shown in hatched lines,) and asheet-metal body, B, already embossed,(shown in dotted lines,) and the tube T,with flange or plate F andflexible rim R, (shown in'broken lines.) The dotted circle 0 is anopening in the body B. G G are bolts holding the inclosure E.

Fig.2 shows a vertical section through the center,the same lettersdenoting the same parts as in Fig. 1.

To carry out my invention, I close all openings or holes in the sheetmetal B except the top opening, 0, and insert into this opening 0 theflexible rim R. The flange or plate F is made a little smaller than theopening 0, so that it will pass through 0 and allow the flexible rim Rto bend back and pass in also. The

flexible rim R is firmly attached to the flange or plate F, and is madeof rubber, leather, or other suitable flexible material, and is largeother sufficiently hard material in sections,

where necessary to lift oil", and is held together by a suitableinclosure, E G E G. The tube T, with flange or plate F, is kept in placeeither by being braced or held from without, or by being inclosed in theinclosure E G E G, as shown. \Vhen so inserted and held, water or anyother suitable fluid is forced into the body B through the tube T. Thepressure against the flexible rim R will press it closely to the edge 0of the body B and form a tightjoint or seal between the tube T and bodyB. The pressure of the fluid is raised high enough to cause the sheetmetal B to yield and closely fill and conform to all the cavities on theinside of the sections D of the die. The necessary pressure and timemust be ascertained by experiment for each kind and thickness of sheetmetal. The pressure is obtained by connect ing the tube T with aforce-pump or other source giving a continuous very high pressure. Whenthe pressure is taken off and the inclosure E G E G and sections D areremoved, the tube T, together with the flange or plate F and rim R, canbe as easily withdrawn as they were inserted.

, For some kinds of sheet metal which yield easier when hot it is ofgreat advantage to use a hot fluid.

Having fully described my invention, what I desire to claim and secureby Letters Patent The combination of the die D, tube T, flange or plateF, and flexible rim R, substantially as shown, for the purposespecified.

ARTHUR LANGERFELD.

\Vitnesses:

T. B. WAKEMAN, A. B. CAMPBELL.

